Marcos Daniel advanced when Julio Silva retired 6-2 3-0 in the Brazil F1 round of 32.
Daniel M. advanced when Silva J. retired.
Marcos Daniel beat Julio Silva 6-2 3-0 after Julio Silva retired. Umpiry, "Marcos Daniel vs Julio Silva — Brazil F1 Round of 32", https://umpiry.com/match/2001-04-16/daniel-vs-silva-brazil-f1-r32?utm_source=cite (as of 16 April 2001).